Package Instance

Vite DOM Clobbering gadget found in vite bundled scripts that leads to XSS
We discovered a DOM Clobbering vulnerability in Vite when building scripts to `cjs`/`iife`/`umd` output format. The DOM Clobbering gadget in the module can lead to cross-site scripting (XSS) in web pages where scriptless attacker-controlled HTML elements (e.g., an img tag with an unsanitized name attribute) are present.

Note that, we have identified similar security issues in Webpack: https://github.com/webpack/webpack/security/advisories/GHSA-4vvj-4cpr-p986

Vite's `server.fs` settings were not applied to HTML files
Any HTML files on the machine were served regardless of the `server.fs` settings.

Vite's `server.fs.deny` is bypassed when using `?import&raw`
The contents of arbitrary files can be returned to the browser.

Vite has a `server.fs.deny` bypassed for `inline` and `raw` with `?import` query
The contents of arbitrary files can be returned to the browser.

Websites were able to send any requests to the development server and read the response in vite
Vite allowed any websites to send any requests to the development server and read the response due to default CORS settings and lack of validation on the Origin header for WebSocket connections.

> [!WARNING]
> This vulnerability even applies to users that only run the Vite dev server on the local machine and does not expose the dev server to the network.

Vite middleware may serve files starting with the same name with the public directory
Files starting with the same name with the public directory were served bypassing the `server.fs` settings.

Vite bypasses server.fs.deny when using ?raw??
The contents of arbitrary files can be returned to the browser.

Improper Access Control
Vite is a frontend tooling framework for javascript. The Vite dev server option `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows. This bypass is similar to CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems. Since `picomatch` defaults to case-sensitive glob matching, but the file server does not discriminate; a block list bypass is possible. By requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. This issue has been addressed in vite@5.0.12, vite@4.5.2, vite@3.2.8, and vite@2.9.17. Users are advised to upgrade. Users unable to upgrade should restrict access to dev servers.